| ??? 09/28/04 11:15 Read: times |
#78250 - RE: WEOT: Good Books on PID Responding to: ???'s previous message |
Prahlad J. Purohit wrote:
------------------------------- I never said I have 2:1 welding transformer my transformer are 20:1 to 50:1 Ooops.Sorry, misread the circuit. Pressure of electrodes depends on the pressure of compressed air what if the air pressure changes during welding. Unlikely that pressure can change that much in 10mSec surely ? Once the clamps are on, are you not regulating the airline feeding the cylinders ? I suppose the tips will mushroom over time though, a factor you can't monitor..... If you are going as sophisticated as you seem to be, why not go the whole way and build an inverter ? There will be loads that are imposed on your proposed ac line system that you will be unable to compensate for under some circumstances, unless your welding cycle is many mains cycles long, whereas with an inverter, you can use the reservoir energy. Don't you need a constant power supply, not a constant current ? Steve |
